# Relationship history for MSHA mine 5400137

Current hierarchy: **Melba  Figueroa; Edgar  Figueroa → Productora De Agregados Inc → Cantera Vega Baja**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Productora De Agregados Inc → Cantera Vega Baja; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Melba  Figueroa et al → Cantera Vega Baja; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melba  Figueroa et al → Productora De Agregados Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edgar  Figueroa et al → Productora De Agregados Inc; 1950-01-01 to current/open; source msha-controller-operator-history